Which number is an rational number?

a.41 sqrt

b.34 sqrt

c.9/2 sqrt

d.13/16 sqrt

What is the difference between regular convex and concave polygons

Read the following two statements. then use the law of syllogism to draw a conclusion. if the tv is too loud, then it will give me a headache. if i have a headache, then i will have to rest.

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?